>> Creating explicit connections between all similar and/or identical
>entries
>> in two schemas is an arduous task that is impractical to do
manually.
>
>[VK] Will mapping each of these schemas to an ontology and then using
the
>ontology to mediate further queries help alleviate the problem?
>
>---Vipul
>
>
This is the approach adopted by caBIG. Individual data models (or
schemata) are related to a common ontology. By itself, this doesn't
allow one to rewrite queries (because of tacit assumptions present in
the respective data models?), but the hope is that development of
query-mediators will be facilitated by the existence of a loose
mapping.
Peter